1 Planning
Topics covered in this chapter:
•
Installation checklist
•
Best practices
•
Temperature limits
•
Recommendations for hygienic and self-draining applications
1.1 Installation checklist
□
Make sure that the hazardous area specified on the approval tag is suitable for the
environment in which the meter will be installed.
□
Verify that the local ambient and process temperatures are within the limits of the
meter.
□
If your sensor has an integral transmitter, no wiring is required between the sensor
and transmitter. Follow the wiring instructions in the transmitter installation manual
for signal and power wiring.
□
If your transmitter has remote-mounted electronics, follow the instructions in this
manual for wiring between the sensor and the transmitter, and then follow the
instructions in the transmitter installation manual for power and signal wiring.
Maximum lengths for Micro Motion cableTable 1-1:
Cable type To transmitter Maximum length
Micro Motion 9-wire 9739 MVD transmitter 1000 ft (300 m)
All other MVD transmit-
ters
60 ft (20 m)
Micro Motion 4-wire All 4-wire MVD transmit-
ters
- 1000 ft (300 m) without Ex-approval
- 500 ft (150 m) with IIC rated sensors
- 1000 ft (300 m) with IIB rated sensors
Maximum lengths for user-supplied 4-wire cableTable 1-2:
Wire function Wire size Maximum length
Power (VDC) 22 AWG (0,35 mm
2
) 300 ft (90 m)
20 AWG (0,5 mm
2
) 500 ft (150 m)
18 AWG (0,8 mm
2
) 1000 ft (300 m)
Signal (RS-485) 22 AWG (0,35 mm
2
) or larger 1000 ft (300 m)
□
For optimal performance, install the sensor in the preferred orientation. The sensor
will work in any orientation as long as the flow tubes remain full of process fluid.
Planning
Installation Manual 1
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